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AQA BIOL5 ~ 17th June 2013 ~ A2 Biology

Reply 1760

DavidYorkshireFTW

18

Original post by AtomicMan

No, neurones secrete neurotransmitters by exocytosis.

Is that when the vesicles in the presynaptic neurone bind to the presynaptic membrane and release acetylcholine?

Reply 1761

AtomicMan

13

Original post by DavidYorkshireFTW

Is that when the vesicles in the presynaptic neurone bind to the presynaptic membrane and release acetylcholine?

yes

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Reply 1762

Mangodepo11

8

Ok I think homeostasis may come up as an essay title, I'm just wondering if theres any other methods of homeostatsis that people can think of apart from-

- Blood pressure
- Temperature
- glucose
- Ph buffers
- Immune response(Possibly)
- Kidney ultrafilteration
?

Reply 1763

AtomicMan

13

Just got 55/100 on the specimen paper, should I be worried? :s-smilie:

Reply 1764

master y

12

Original post by AtomicMan

Just got 55/100 on the specimen paper, should I be worried? :s-smilie:

including the essay? if without essay then that's excellent

Reply 1765

AtomicMan

13

Original post by master y

including the essay? if without essay then that's excellent

With essay :ahee:

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Reply 1766

Anjna

9

Original post by AtomicMan

Just got 55/100 on the specimen paper, should I be worried? :s-smilie:

no don't be worried. just look back through the paper and see what topics you didn't do so well in and go over them and improve. :smile:

Reply 1767

master y

12

Original post by AtomicMan

With essay :ahee:

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well the specimen is very hard anyway, i wouldn't worry! i probably got the same mark

Reply 1768

blueeyedgirl

2

Hey guys

Am I right in thinking that as I got a B in Unit 4, I can't get an A* overall? I assumed this was true but a friend confused me about the A* today! Thanks :smile:

Reply 1769

Beth_L_G

10

Original post by blueeyedgirl

Hey guys

Am I right in thinking that as I got a B in Unit 4, I can't get an A* overall? I assumed this was true but a friend confused me about the A* today! Thanks :smile:

As long as you get an A overall, and 270 ums in A2 you can still get an A*

Reply 1770

ActaNonVerba

need help on essay writing! :frown:

does anyone know where I can find sample essay answers (that get high marks, about 20-24 range) or if anyone is willing to send me their own answers so I can have a look to see how to approach things.

Reply 1771

charch95

Original post by mariposaa

Has anyone studied the kidneys in relation to homeostasis (for off-spec essay topic)? I can't seem to find any clear reading material, suggestions would be greatly appreciated!

Edit:

@charch95, what materials did you use? Or websites?...Please?

This was just on a list of essay plans that my teacher gave me. Sorry, I don't have any other materials, or know anything personally about the kidney.

Reply 1772

ahawkes06

Hi there,

Does anyone know how much this UNIT 5 BIOL is worth?

I think it's around 23.3%. If I'm averaging a solid B on the other 77%, then whats the lowest I can get on this paper and still achieve a B overall?

I've left myself a week to revise it and starting to panic!

Reply 1773

F1's Finest

21

Original post by Richyp22

Ok I think homeostasis may come up as an essay title, I'm just wondering if theres any other methods of homeostatsis that people can think of apart from-

- Blood pressure
- Temperature
- glucose (concentration?)
- Ph buffers
- Immune response(Possibly)
- Kidney ultrafilteration
?

also....

blood pressure?

It can be controlled via the SAN, with impulses either from the sympathetic or parasymphatetic nerves?

Reply 1774

master y

12

Original post by ahawkes06

Hi there,

Does anyone know how much this UNIT 5 BIOL is worth?

I think it's around 23.3%. If I'm averaging a solid B on the other 77%, then whats the lowest I can get on this paper and still achieve a B overall?

I've left myself a week to revise it and starting to panic!

i think u can get a C in biol5 to get a B overall. you would need to panic only if u need an a overll! :vader:

Reply 1775

Gnome :)

2

Original post by ahawkes06

Hi there,

Does anyone know how much this UNIT 5 BIOL is worth?

I think it's around 23.3%. If I'm averaging a solid B on the other 77%, then whats the lowest I can get on this paper and still achieve a B overall?

I've left myself a week to revise it and starting to panic!

How many UMS points (roughly) do you have?

If you had the middle B grade marks in each unit, that would be 225 UMS in AS year + 75UMS in U4 + 45UMS in U6= 345UMS in total. You need 420 total UMS marks for a B overall, so that's 75UMS for U5, which equates to a D grade :smile:

It does depend on your own UMS marks though.

Reply 1776

loveheartsandall

8

Hey, I have a question about how the synoptic essay is marked

Does anyone know if the criterias are marked independently??? E.G. If I was writing an essay on 'cycles in biology' and I wrote about three cycles, two of them were physiological cycles whilst the other is say a cycle in predation, and my scientific knowledge was good - would I only lose marks on breadth??

My teacher has been marking it dependently so despite writing all the right things, I got marked down on both scientific knowledge and breadth. Can anyone clarify?

Reply 1777

master y

12

Can anyone tell me what topics AS and A2 go under the topics

1. Physiological
2. Ecological ?

Thanks

Reply 1778

Beth_L_G

10

Original post by loveheartsandall

Hey, I have a question about how the synoptic essay is marked

Does anyone know if the criterias are marked independently??? E.G. If I was writing an essay on 'cycles in biology' and I wrote about three cycles, two of them were physiological cycles whilst the other is say a cycle in predation, and my scientific knowledge was good - would I only lose marks on breadth??

My teacher has been marking it dependently so despite writing all the right things, I got marked down on both scientific knowledge and breadth. Can anyone clarify?

You need to make 16 accurate points to get the 16 marks, and mention either 3 kingdoms or points from 3 different modules to get the breadth. So if you only wrote about 3 cycles, they would each have to have about 6 steps that you wrote about in incredible detail

Your teacher has been marking correctly

Hope that's helpful :smile:

Reply 1779

master y

12

Original post by Beth_L_G

You need to make 16 accurate points to get the 16 marks, and mention either 3 kingdoms or points from 3 different modules to get the breadth. So if you only wrote about 3 cycles, they would each have to have about 6 steps that you wrote about in incredible detail

Your teacher has been marking correctly

Hope that's helpful :smile:

what denotes a 'point'

AQA BIOL5 ~ 17th June 2013 ~ A2 Biology

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